/*
 * Copyright 2016-2018 Leon Chen
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.moilioncircle.redis.replicator.cmd.impl;

import java.io.Serializable;

/**
 * @author Leon Chen
 * @since 2.1.0
 */
public enum ExistType implements Serializable {
    /**
     * not set
     */
    NONE,
    /**
     * Don't update already existing elements
     */
    NX,
    /**
     * Only update elements that already exist
     */
    XX
}
